JB Conversions 16-1204 HD Standard Length SYE Kit for the NP241 - Manual (Page 7)

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10) Gently pry the two halves apart using a screwdriver. There are two
locations in the case designed for use as pry points. Only use these
two locations. They are located on the sides of the case half (Fig.9).
FIG: 9
11) Lift the rear case half and pump off of the front case half (Fig.10).
FIG: 10